20571928852 has 12 divisors (see below), whose sum is σ = 36405380340. Its totient is φ = 10170391616.

The previous prime is 20571928841. The next prime is 20571928891. The reversal of 20571928852 is 25882917502.

It can be written as a sum of positive squares in 2 ways, for example, as 9080946436 + 11490982416 = 95294^2 + 107196^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20571928796 and 20571928805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28892803 + ... + 28893514.

It is an arithmetic number, because the mean of its divisors is an integer number (3033781695).

Almost surely, 2^20571928852 is an apocalyptic number.

It is an amenable number.

20571928852 is a deficient number, since it is larger than the sum of its proper divisors (15833451488).

20571928852 is a wasteful number, since it uses less digits than its factorization.

20571928852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57786410 (or 57786408 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 20571928852 in words is "twenty billion, five hundred seventy-one million, nine hundred twenty-eight thousand, eight hundred fifty-two".